Audio-Technica AT4053b instruction

AT4053b HYPERCARDIOID CONDENSER MICROPHONE

•Specially engineered to meet the most critical acoustic requirements of professional recording, broadcast and sound reinforcement

•Direct-coupled, balanced output results in a clean signal even under high-output conditions

•Transformerless circuitry virtually eliminates low-frequency distortion and provides superior correlation of high-speed transients

•Switchable 80 Hz hi-pass filter and 10 dB pad

•Rugged turned-brass microphone housing for enduring dependability

•State-of-the-art design and manufacturing techniques ensure compliance with A-T’s stringent consistency and reliability standards

The AT4053b is intended for use in professional applications where remote power is available. It requires 48V DC phantom power, which may be provided by a mixer or console, or by a separate, in-line sourc e such as the Audio-Technica AT8801 single-c hanne l or CP8506 four-channel phantom power supplies.

Out put fro m the mic ropho ne' s XL RM- typ e conn ector is low impedance (Lo-Z) balanced. The signal appears across Pins 2 and 3; Pin 1 is ground (shield). Output phase is “Pin 2 hot” – positive acoustic pressure produces positive voltage at Pin 2.

To avoid phase cancellation and poor sound, all mic cables must be wired consistently: Pin 1-to-Pin 1, etc.

An integral 80 Hz hi-pass filter provides easy switching from a flat frequency response to a low-end roll-off. The high-pass positio n reduces the microphone's sensitivity to popping in close vocal use. It also reduces the pickup of low-frequency ambient noise (such as tra ffic, air- handling systems, etc.), room reverberatio n and mechanically coupled vibrations.

The AT4053b consists of two modular subassemblies: an AT4900b-48 body and an AT4053b-EL head capsule (both available separately). Additional interchangeable capsules are available in omnidirectional (AT4049b-EL) and cardioid (AT4051b-EL).

Avoid leaving the microphone in the open sun or in areas where temperatures exceed 110° F (43° C) for extended periods. Extremely high humidity should also be avoided.

AT4053b SPECIFICATIONS†

ELEMENT	Externally polarized
	(DC bias) capacitor

POLAR PATTERN	Hypercardioid

FREQUENCY RESPONSE	20-20,000 Hz

LOW FREQUENCY ROLL-OFF	80 Hz, 12 dB/octave

OPEN CIRCUIT SENSITIVITY	–34 dB (19.9 mV) re 1V at 1 Pa*

IMPEDANCE	50 ohms

MAXIMUM INPUT SOUND LEVEL	145 dB SPL, 1 kHz at 1% T.H.D.;
	155 dB SPL, with 10 dB pad
	(nominal)

NOISE1	16 dB SPL

DYNAMIC RANGE (typical)	129 dB, 1 kHz at Max SPL

SIGNAL-TO-NOISE RATIO1	78 dB, 1 kHz at 1 Pa*
PHANTOM POWER REQUIREMENTS	48V DC, 4.8 mA typical

SWITCHES	Flat, roll-off; 10 dB pad (nominal)

WEIGHT (less accessories)	127 g (4.5 oz)

DIMENSIONS	155.0 mm (6.10") long,
	21.0 mm (0.83") maximum body
	diameter

OUTPUT CONNECTOR	Integral 3-pin XLRM-type

ACCESSORIES FURNISHED	AT8405a stand clamp for 5/8"-27
	threaded stands; windscreen;
	protective carrying case